<template>
    <div class='xtx-carousel' @mouseenter="enter()" @mouseleave="leave()">
        <ul class="carousel-body">
            <li class="carousel-item" v-for="(item, index) in banner" :key="item.id" :class="{ fade: keys == index }">
                <RouterLink to="/">
                    <img :src="item.imgUrl">
                </RouterLink>
            </li>
        </ul>
        <a href="javascript:;" class="carousel-btn prev" @click="prev()"><i class="iconfont icon-angle-left"></i></a>
        <a href="javascript:;" class="carousel-btn next" @click="next()"><i class="iconfont icon-angle-right"></i></a>
        <div class="carousel-indicator">
            <span v-for="(item,index) in banner" :key="index"  :class="{aaa:index==keys}"></span>
        </div>
    </div>
</template>
  
<script>

export default {
    name: 'XtxCarousel',
    props: ['banner'],
    data() {
        return {
            keys: 1,
            timer: null
        }
    },
    methods: {
        prev() {
            if (this.keys == 0) {
                this.keys = this.banner.length - 1
            } else {
                this.keys--
            }
        },
        next() {
            if (this.keys == this.banner.length - 1) {
                this.keys = 0
            } else {
                this.keys++
            }
        },
        enter() {
            clearInterval(this.timer)
            this.timer = null
        },
        leave() {
            this.timers()
        },
        timers() {
           
           this.timer =  setInterval(() => {
                    this.keys++
                    if (this.keys > this.banner.length - 1) {
                        this.keys = 0
                    }
                }, 2000)
        }
    },
    mounted() {
        this.timers()

    },
    beforeDestroy(){
        clearInterval(this.timer)
    }
}
</script>
<style  lang="scss" scoped>
.aaa{
    background: white !important;
}
.xtx-carousel {
    width: 100%;
    height: 100%;
    min-width: 300px;
    min-height: 150px;
    position: relative;

    .carousel {
        &-body {
            width: 100%;
            height: 100%;
        }

        &-item {
            width: 100%;
            height: 100%;
            position: absolute;
            left: 0;
            top: 0;
            opacity: 0;
            transition: opacity 0.5s linear;

            &.fade {
                opacity: 1;
                z-index: 1;
            }

            img {
                width: 100%;
                height: 100%;
            }
        }

        &-indicator {
            position: absolute;
            left: 0;
            bottom: 20px;
            z-index: 2;
            width: 100%;
            text-align: center;

            span {
                display: inline-block;
                width: 12px;
                height: 12px;
                background: rgba(0, 0, 0, 0.2);
                border-radius: 50%;
                cursor: pointer;

                ~span {
                    margin-left: 12px;
                }

                &.active {
                    background: #fff;
                }
            }
        }

        &-btn {
            width: 44px;
            height: 44px;
            background: rgba(0, 0, 0, .2);
            color: #fff;
            border-radius: 50%;
            position: absolute;
            top: 228px;
            z-index: 2;
            text-align: center;
            line-height: 44px;
            opacity: 0;
            transition: all 0.5s;

            &.prev {
                left: 20px;
            }

            &.next {
                right: 20px;
            }
        }
    }

    &:hover {
        .carousel-btn {
            opacity: 1;
        }
    }
}
</style>
  